Answer:
perpendicular lines
Step-by-step explanation:
Answer:
34(43+33(jg
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
sum the parts of the ratio, 2 + 1 = 3 parts , thus
81 cm² ÷ 3 = 27 cm² ← value of 1 part of the ratio
2 parts = 2 × 27 = 54 cm²
Area of A = 54 cm² and area of B = 27 cm²
The side of the original square =
= 9 cm
The width of both rectangles is 9 cm ( width remains unchanged after cut )
Thus
Rectangle A
9 × length = 54 ( divide both sides by 9 )
length = 6 cm
Rectangle B
9 × length = 27 ( divide both sides by 9 )
length = 3 cm
Rectangle A → length = 6 cm, width = 9 cm
Rectangle B → length = 3 cm , width = 9 cm
We are given that it takes 7 joules of heat to raise the
temperature of the bar by 1°C. Therefore this means that the heating capacity Cp
is:
Cp = 7 J / °C
The formula for the amount of heat required is:
heat = Cp (Tf – Ti)
where Ti is initial temperature = 25°C, and Tf is the
final temperature
When Tf = 26°C
heat = 7 (26 – 25) = 7 J
When Tf = 27°C
heat = 7 (27 – 25) = 14 J
When Tf = 28°C
heat = 7 (28 – 25) = 21 J
When Tf = 29°C
heat = 7 (29 – 25) = 28 J
When Tf = 30°C
heat = 7 (30 – 25) = 35 J
When Tf = 35°C
heat = 7 (35 – 25) = 70 J